package org.example.node;

/**
 * @author liyishan
 * @date 2024/2/20 09:24
 * @apiNote
 */

public class LCR142TrainningPlan {

    public ListNode trainningPlan(ListNode l1, ListNode l2) {
        if(l1 == null){
            return l2;
        }else if(l2 == null){
            return l1;
        }else if(l1.val < l2.val){
            l1.next = trainningPlan(l1.next, l2);
            return l1;
        }else{
            l2.next = trainningPlan(l1, l2.next);
            return l2;
        }
    }

    public ListNode trainningPlan1(ListNode l1, ListNode l2) {
        ListNode preHead = new ListNode(-1);
        ListNode prev = preHead;
        while(l1 != null && l2 != null){
            if(l1.val <= l2.val){
                prev.next = l1;
                l1 = l1.next;
            }else{
                prev.next = l2;
                l2 = l2.next;
            }
            prev = prev.next;
        }
        prev.next = l1 == null ? l2 : l1;
        return preHead.next;
    }
}
